package com.example;

import java.util.HashMap;
import java.util.Map;
import java.util.Random;
//线程内部共享数据，线程间数据独立
public class ThreadScopeShareData {
    //private static int data = 0;
    private static Map<Thread, Integer> threadData = new HashMap<>();

    public static void main(String[] args) {
        for (int i = 0; i < 2; i++) {
            new Thread(
                    new Runnable() {
                        @Override
                        public void run() {
                            int data = new Random().nextInt();
                            System.out.println(Thread.currentThread().getName() + "has put data:" + data);
                            threadData.put(Thread.currentThread(), data);
                            new A().get();
                            new B().get();
                        }
                    }
            ).start();
        }
    }

    static class A {
        public void get() {
            int data = threadData.get(Thread.currentThread());
            System.out.println("A from" + Thread.currentThread().getName() + "has put data:" + data);
        }
    }

    static class B {
        public void get() {
            int data = threadData.get(Thread.currentThread());
            System.out.println("B from" + Thread.currentThread().getName() + "has put data:" + data);
        }
    }
}
